Biktrix

Juggernaut Ultra Duo 3 ST

Price $3,199
Motor (Nominal) 1,000 W
Range 45 mi
Inventory Check Inventory
Juggernaut Ultra Duo 3 ST
Performance Review
8.4/10 ebikes.com score
Highly Recommended
Excellent performance with minor tradeoffs.
Editorial Score
Data-driven rating breakdown
8
/100
Power
9/10
Range
8/10
Comfort
8/10
Build Quality
8/10
Value
9/10
Starting at
--
Price
Nominal power
1,000 W
Motor (Nominal)
Capacity
910 Wh
Battery
Estimated range
45 mi
Range
Max speed
--
Top Speed
Max load
265 lbs
Payload Capacity
Folds
No
Foldable

Editorial Insights

Reasons to Buy

  • + Equipped with the immensely powerful Bafang Ultra M620 mid-drive motor boasting 1500W peak power and 160Nm of torque for conquering extreme hills and challenging terrain.
  • + Features a robust 910Wh internal battery with an impressive option for an external range extender, allowing for a total capacity of up to 1794Wh and extended adventures.

Reasons to Avoid

  • - Weighing in at 75-77 lbs (without battery), this is a significantly heavy e-bike, which could hinder portability and make unassisted maneuvering difficult.
  • - While it offers a comfortable spring-supported saddle and a 100mm travel front suspension, the absence of rear suspension might limit comfort on very rough trails.
Expert Verdict

In-Depth Analysis

Biktrix Juggernaut Ultra Duo 3 ST: A Powerhouse for Any Adventure

The Biktrix Juggernaut Ultra Duo 3 ST positions itself as a formidable contender in the e-bike market, especially for riders who refuse to compromise on power and versatility. At its heart lies the renowned Bafang Ultra M620 mid-drive motor, delivering a staggering 1000W continuous power, 1500W peak, and an incredible 160Nm of torque. This motor, paired with an 11-speed SRAM NX drivetrain, ensures that hills, heavy loads, and challenging trails are tackled with astonishing ease. The bike also offers both torque and cadence sensors for a natural yet powerful pedal assist, complemented by an on-demand thumb throttle for when you prefer to cruise effortlessly. From its 6061 aluminum frame to its Biktrix dual-piston hydraulic brakes, the Ultra Duo 3 ST is engineered for robust performance and reliability, making it a true workhorse for both daily commutes and rugged off-road exploration.

Battery Life and Ride Experience

One of the standout features of the Juggernaut Ultra Duo 3 ST is its impressive battery system. The standard internal 52V 17.5Ah (910Wh) battery provides an estimated range of up to 45 miles, which is solid for a bike of this power. What truly sets it apart, however, is the option to add an external range extender battery, potentially boosting the total capacity to a colossal 1794Wh—enough for adventures stretching over 100 miles. Comfort is also well-addressed with a 100mm travel RST Renegade coil spring suspension fork, an adjustable stem, and a spring-supported comfy cruiser saddle, dampening bumps on varied terrains. Integrated front and rear lights, metal fenders, and a rear rack add to its utility, ensuring it’s ready for any journey, day or night, rain or shine. The current sale price of $3,199, down from $3,999, also presents an exceptional value for such a high-performance machine.

Considerations for the Adventurous Rider

While the Juggernaut Ultra Duo 3 ST offers unparalleled power and features, potential buyers should be aware of a few aspects. With a weight of around 75-77 lbs without the battery, it's a heavy e-bike, which might require extra effort for transport or if you run out of charge. Furthermore, while the front suspension and comfy saddle enhance the ride, the lack of rear suspension might be noticeable on particularly aggressive trails. The availability of multiple wheel sizes (24x4, 26x4, 27.5x3) allows for significant customization to suit specific riding conditions, from snow and sand to pavement and groomed trails. Overall, the Biktrix Juggernaut Ultra Duo 3 ST is an exceptionally well-equipped and powerful e-bike that delivers on its promise of conquering any terrain, making it an excellent choice for riders seeking a high-performance, versatile, and feature-rich electric fat-tire bike.

Specs

Key specifications for Juggernaut Ultra Duo 3 ST, organized for quick scanning.

Pricing
Price --
Motor
Motor (Nominal) 1,000 W
Motor (Peak) 1,500 W
Battery
Battery 910 Wh
Battery (Ah) 17.5 Ah
Performance
Range 45 mi
Top Speed --
Utility
Weight 77.2 lbs
Payload Capacity 265 lbs
Foldable No

Real-World Range Estimator

43.3 mi
Based on 910 Wh battery capacity
Motor Type
Terrain
How is this calculated?

How We Score eBikes

At eBikes.com, we believe in complete transparency. Our Editorial Scores are not influenced by sponsorships or brand partnerships. They are calculated using a strict, data-driven logic gate based on manufacturer specifications:

⚡ Power Graded strictly by Motor Wattage. A baseline 250W earns an average score, with higher continuous outputs scaling linearly to the maximum score.
🗺️ Range Graded by Battery Capacity (Watt-hours). A standard 300Wh battery serves as the baseline, rewarding bikes that offer extended range capacities.
🛋️ Comfort Calculated by suspension type (Full, Front, or Rigid) and frame geometry (Step-Thru vs. Step-Over) to determine overall ride smoothness.
🛠️ Build Quality Assessed via component tiers. Bikes receive premium marks for Hydraulic Brakes, UL 2849 safety certifications, and premium price-tier construction.
0 eBikes selected
Compare Now